Radar is a way of discovering the position or speed of objects such as aircraft or ships when they cannot be seen, by using radio signals. 雷达
noun [专属名词] 雷达，无线电探测系统；（人的）直觉感知能力，（对因素或潮流等的）敏感性
They located the ship by radar. 他们通过雷达确定了船只的位置。
- radar 出现在下面的课文中（提供视频、音频及笔记等可系统性学习）
- Lesson 7 Bats
